When an egg is placed in a jar filled with water, it sinks to bottom because weight of water displaced byegg is less than weight of egg itself. So the buoyancy provided by displacing water to the egg is notenough to keep the egg floating in jar.​ When salt is added to water in jar, it increases its density. It helps increase buoyancy which water applies to egg. So we have to add enough salt to water to increase density and buoyancy of water to support weight of egg to make it float.​

When an egg is placed in a jar filled with water, it sinks to bottom because weight of water displaced by egg is less than weight of egg itself. So the buoyancy provided by displacing water to the egg is not enough to keep the egg floating in jar.​ ​ When salt is added to water in jar, it increases its density. It helps increase buoyancy which water applies to egg. So we have to add enough salt to water to increase density and buoyancy of water to support weight of egg to make it float.​ ​ Density = Mass of an object / Volume of that object​ ​ Buoyancy =  Upward force applied by water on egg   ​

Things we have to be very careful to keep the same every time we test so that they do not affect the results/outcome of the experiment: ​ Container: use the same type and size of container.​ Water volume: Using the same amount of water.​ Size of egg: Using the same size of egg for all trials, as egg ​ density can vary.​ Temperature: Keeping the water at same temperature, as it can influence the density.​ Mixing method: Ensuring that the salt is fully dissolved in each trial.​

1. Fill transparent container with tap water​
2. Place egg into container carefully​
3. Observe the egg in container ​
4. The egg sinks to bottom of container filled with water​
5. Remove egg from container​
6. Add salt to water in container and stir it well​
7. Put egg into container again​
8. Observe if egg sinks or float​
9. If egg sinks then carefully take out egg from container, add more salt into container and stir it well​
10. Repeat step # 7,8,9 till egg starts floating in container saltwater.​

According to data, in 1st trial , egg sink in regular tap water because the density of the egg wasgreater than the density of water. ​ In 2nd and 3rd trial, adding 3tbsp to 6tbsp of salt to the water, increased the density of thewater by adding more mass in the given volume.  By adding enough salt, density of the waterincreased, so that it is higher than the density of the egg and the egg finally floated in water.​ ​

My question was:​ Does salt affect density of egg?​ ​ ​The answer to my question is: ​ Yes, salt does affect density of an egg.​

My hypothesis was correct because:​ When more salt is added in water, it increases the density of water which makes egg to float.​

The experiment findings are useful for educational purposes to understand the principles ofdensity and buoyancy.​ The experiment is benefitted in understanding when designing ships as heavy ships  can float in water as their weight displace weight of water greater than their own weight.​ Another benefit is to check egg freshness.​

My experiment results were reliable.​ Factors that could have affected my experiment are :​

• Egg quality and age of egg because as egg ages, they build up air pocket which make themless dense and more likely to float in room temperature water.​
• Temperature of water could have affected my experiment as it affects the density andsolubility of water​
• Lack of dissolving of salt or salt partially dissolved in water could have affected theexperiment​

I Ranveer Singh acknowledges that this project is done by me in supervision of my parents and my teacher Parents name Navjot Saini- Mom Amanpreet Singh - Dad Kimberly Allyson Nolasco- Grade 5 Humanities Teacher